Argyria insons 
Argyrocosma inductaria 
Argyrodes miniaceus 
Argyrophorus chiliensis 
Argyrotome prospectata 
Arhodia lasiocamparia 
Arhopala elopura 
Arhopala major 
Arhopala meander 
Arhopalus productus 
Arhopalus rusticus 
Ariamnes cylindrogaster 
Ariconias glaphyra 
Arid eudesmia moth 
Arilus gallus 
Ariola coelisigna 
Ariolica lineolata 
Aristaria nigrifrons 
Aristobia horridula 
Aristotelia pudibundella 
Aristotle's Duke 
Arizona bark scorpion 
Arizona Bird-dropping Moth 
Arizona Tan Mantis